4 Works

Data from: Migratory constraints on yolk precursors limit yolk androgen deposition and underlie a brood reduction strategy in rockhopper penguins

Glenn T. Crossin, Maud Poisbleau, Laurent Demongin, Olivier Chastel, Tony D. Williams, Marcel Eens & Petra Quillfeldt
Hormonally mediated maternal effects link maternal phenotype and environmental conditions to offspring phenotype. The production of lipid-rich maternal yolk precursors may provide a mechanism by which lipophilic steroid hormones can be transported to developing yolks, thus predicting a positive correlation between yolk precursors in mothers and androgen levels in eggs. Using rockhopper penguins (Eudyptes chrysocome), which produce a two-egg clutch characterized by extreme egg-size dimorphism, reversed hatching asynchrony and brood-reduction, we examined correlations between circulating...

Data from: Quantifying population divergence on short timescales

Joost A. M. Raeymaekers, Luc Lens, Frederik Van Den Broeck, Stefan Van Dongen & Filip A. M. Volckaert
Quantifying the contribution of the various processes that influence population genetic structure is important, but difficult. One of the reasons is that no single measure appropriately quantifies all aspects of genetic structure. An increasing number of studies is analyzing population structure using the statistic D, which measures genetic differentiation, next to GST, which is the standardized variance in allele frequencies among populations. Few studies have evaluated which statistic is most appropriate in particular situations. In...

Data from: Adaptability of large carnivores to changing anthropogenic food sources: diet change of spotted hyena (Crocuta crocuta) during Christian fasting period in northern Ethiopia

Gidey Yirga, Hans H. De Iongh, Herwig Leirs, Kindeya Gebrihiwot, Jozef Deckers & Hans Bauer
Many large carnivores readily use anthropogenic food sources, which often leads to conflict. Spotted hyenas (Crocuta crocuta) around the regional capital Mekelle, northern Ethiopia, feed on waste and to a lesser degree on livestock, but not on natural prey. We investigated the impact on their diet of the 55 day fasting period prescribed by the Ethiopian Orthodox Tewahedo Church, during which the vast majority of people do not consume animal products. We collected spotted hyena...

Data from: The evolution of locomotor rhythmicity in tetrapods

Callum F. Ross, Richard W. Blob, David R. Carrier, Monica A. Daley, Stephen M. Deban, Brigitte Demes, Janaya L. Gripper, Jose Iriarte-Diaz, Brandon Michael Kilbourne, Tobias Landberg, John D. Polk, Nadja Schilling & Bieke Vanhooydonck
Differences in rhythmicity (relative variance in cycle period) between mammal, fish, and lizard feeding systems have been hypothesized to be associated with differences in their sensorimotor control systems. We tested this hypothesis by examining whether the locomotion of tachymetabolic tetrapods (birds and mammals) is more rhythmic than that of bradymetabolic tetrapods (lizards, alligators, turtles, salamanders). Species averages of intra-individual coefficients of variation in cycle period were compared while controlling for gait and substrate. Variance in...

Registration Year

  • 2012

Resource Types

  • Dataset


  • University of Antwerp
  • KU Leuven
  • Max Planck Institute for Ornithology
  • Ghent University
  • Dalhousie University
  • Simon Fraser University
  • University of Chicago
  • Leiden University
  • French National Centre for Scientific Research
  • University College London